58b (B6b) 1915 3d on 30pf black and orange on buff Kaiser's Yacht overprinted C.E.F. (SG Type 1), ERROR - surcharged triple, two albino, rare, only 50 printed (12 of which are in one collection), this example is row 3, pos 4, ex-Robert Gibbs, with photocopy of the BPA certificate for a block of 24 that this is from.